APRILIA Pegaso 650 I.E., Service Manual

Page: 289 / 320

REPAIR INFORMATION
8 - 3
Pegaso 650 I.E.
42/5",%3(//4).'
a
CAUTION
Any damage to the ignition coil, the drive shaft
position sensor and the thermistors is automatically
detected by the electronic unit; blinking of the
warning light "
û
" positioned on the dashboard.
For this reason, the malfunctions of these compo-
nents are not repeated in the troubleshooting table;
see relevant chapters in sect. 4 (FUEL SUPPLY SY-
STEM) and sect. 6 (ELECTRIC SYSTEM).
NOTE
In the following table, the operations marked
with (*) must be carried out consulting the Engine service
and repair manual, see 0.4.1 (ENGINE SERVICE AND
REPAIR MANUALS).
8.1.1 ENGINE
DEFECT SYMPTOM AND POSSIBLE CAUSES REMEDY
The engine does not start
or has trouble starting Engine shutoff switch set to “
1
” Set to “
2
”
Starting safety logic not satisfied Check and restore the
necessary conditions
Fall sensor faulty Replace
Vent hole on tank cap clogged Clean
Battery charge insufficient Recharge
Battery damaged Replace
Free-wheel, gear free-wheel worn or faulty Replace (*)
Starter idler gears worn or faulty Replace (*)
Starter motor toothing broken Replace (*)
Spark plug dirty Replace
Spark plug wet Clean or replace
Spark plug loose Tighten
Spark plug are not to spec. Replace
Cold start cable not working Check
Fuel filters dirty or fuel supply pipes clogged Clean or replace
Fuel pump, relay or wiring faulty Replace
Fuel pressure regulator faulty Replace
Injectors faulty Replace
Valve clearance incorrect Adjust (*)
Camshaft timing faulty Adjust (*)
Valves, valve guides or valve seats worn Replace
Decompressor stops too late Verify easy movement of
decompressor, change
decompressor spring (*)
Piston segments worn Replace the segments (*)
Cylinder worn Replace the cylinder (*)
Excessive clearance between pick-up and rotor Adjust the clearance (*)
Ignition system faulty Check rotor, central unit
stator, change faulty
component (*)
Engine stops too
frequently Spark plug dirty Clean
Ignition system faulty Repair or replace (*)
Cooling system pipes clogged Replace
Injectors clogged Replace
Air cleaner clogged Clean
Fuel filters clogged Clean or replace
Follow
ã
Release 00/2002-02
- 00